Machines for the continuous simultaneous-rolling



March 3, 1964 3,122,949 ING E. BRANDENBURG ETAL MACHINES FOR THE CONTINUOUS SIMULTANEOUS-ROLL OF SEVERAL WIRES WITH ALTERNATING VERTICAL A'ND HORIZONTAL STANDS ARRANGED ONE BEHIND THE OTHER 2 SheetsSheet 1 Filed Feb. 10, 1959 Jn vemor 4 5141440 BBQAJDEA/BZ/EG March 1964 E. BRANDENBURG ETAL 3,122,949-

MACHINES FOR THE CONTINUOUS SIMULTANEOUS ROLLING OF SEVERAL WIRES WITH ALTERNATING VERTICAL AND HORIZONTAL STANDS ARRANGED ONE BEHIND THE OTHER Filed Feb. 10, 1959 2 Sheets-Sheet 2 United States Patent 3 122,949 MACHINES FQR TIE CONTINUGUS SHMUELTANE- GUS ROLLING 0F SEWRAL WIRES WETH Ail- I'ERNATENG VERTICAL AND HGRIZQNTAL STANDS ARRANGED ENE BEHIND THE OTI-ER Ewaid Brandenburg, Albert Pohie, and Kurt Giiriich, all

of Gberhausen, Rhineiand, Germany, assignors to Huttenwerir Oberhausen Akt'iengeseilschait, Qberbausen, Rhineland, Germany, a firm Fiied Feb. 10, 1959, Ser. No. 792,429 Claims priority, application Germany, Feb. 12, 1958 6 Ciaims. (Q1; 8035) The invention relates to an apparatus for the continuous, simultaneous rolling of several wires or rods with alternating horizontal and vertical stands of rolls arranged one behind the other, the object being to produce such an apparatus enabling the production of rolled stock which is true to size within narrow limits when rolling two or more wires or rods at the same time.

Hitherto only rolled stocks for which the gauge accuracy requirements are relatively low have been produced in these rolling mills simultaneously working more than one wire, because diflerent stressing becomes apparent in each wire during the rolling operation. These different stressing conditions are due to the change in pressure caused by the running in of the next following two or three wires or rods, the variations in temperature in the stock being rolled, the unequal wear of the rolls and so forth. It has hitherto not been possible to counteract these causes.

Continuons rolling mills are known in which guide channels are provided bet-ween the groups of roll trains composed of two or more horizontal stands of rolls, which guide channels are so constructed that they allow the wire or rod being rolled to hang down and consequently the rolling can be carried out relatively free from stress. In the case of the vertical arrangement of the roll stands in such rolling mills it is not possible to prevent the formation of freely hanging loops of rolled stock of difierent, and in some cases considerable sizes which cause numerous breakdowns always necessitating the stopping of the whole train of rolls. For this reason the arrangement above described cannot be used in continuous rolling mills with alternating horizontal and vertical roll stands.

In the case of continuous rolling mills with alternating horizontal and vertical roll stands it has already been attempted to carry out multiple wire rollings in such a manner that each rolled strand or wire has its own guide channels preventing the stock from sagging and in this manner to interconnect the corresponding passes of the successive sets of rolls following each other. This arrangement makes no provision for compensating, eliminating or keeping within permissible limits the considerable tensile stresses occurring in the individual wires of the rolled stock during the rolling operation and which may lead to the tearing of the material being rolled. As a result it is not possible .to obtain final products which are sufficiently true to gauge and ensure perfect running free from breakdowns, so that this manner of procedure has not been introduced into practice.

The invention discloses a way of overcoming the abovementioned disadvantages and difiiculties.

According to .the invention a downwardly curved guide channel open at the top is provided between each horizontal roll stand and the next following vertical roll stand in the direction of the pass, for each wire, that is for each two corresponding grooves or passes of these two roll stands a downwardly curved guide channel is provided through which the stock being rolled is guided, the rolls being adjusted if necessary, and between each 3,122,949 Patented Mar. 3, 1964 vertical stand and the horizontal stand following it a separate loop table is arranged for each wire being rolled, that is for each two corresponding grooves or passes of these two stands a separate loop table is provided. By the first-mentioned guide channels it is possible to detect the tensile stress actually prevailing in the individual wires during the rolling operation. Thus the tensile stresses prevailing between the horizontal stands and the vertical stands which follow them are prevented in the individual wires or stock being rolled to such an extent that considerable deviations from the required cross-sections of the finished stock do not occur between the horizontal and vertical stands. As a result of this arrangement of a loop table for each wire between the vertical stand and the following horizontal stand it is possible to obtain in this phase of the rolling operation almost complete freedom from stressing in all the wires or strands being rolled and consequently technically perfect accuracy to gauge of the finished stock.

A guide channel is preferably coordinated to each loop table and the wire or strand, after being gripped by the next horizontal roll stand, is caused to run out of this channel. These guide channels are also open at the top.

To facilitate the running out of the stock being rolled from the guide channels, each of these channels may be provided with a swinging lever which can be actuated by compressed air or the like.

Depending upon the local conditions and the number of wires or strands being rolled, the loop tables can be arranged in different ways. For a rolling mill in which two wire or strand rolling is carnied out, the loop tables may, for example, be arranged so that the loop table for one stand is located on the right side of the center line between the two stands and the other loop table on the left side of this line. Another possible arrangement for the loop tables would be that the two tables are placed one above the other either on the right side or on the left side of the center line.

In the case of a rolling mill for three wire or strand rolling the arrangement might be so chosen that two loop tables are on one side of the center line which 0011-. nects the two stands and one such table on the other side of this line.

For rolling with still more wires or strands a correspondingly larger number of loop tables would be provided.

The main advantage of the invention consists in that during the rolling operation the stock is subjected sub stantially only to the stressing which is caused by the reduction in cross-section by rolling and does not undergo any considerable supplementary tensional, bending or torsional stressing. Consequently the finished product obtained meets very high requirements as regards accuracy to gauge.

An embodiment of the invention is illustrated by way of example in the accompanying drawings, in which:

PEG. 1 shows a rolling mill in longitudinal section;

FIG. 2 is a top plan view of the rolling mill illustrated in FIG. 1, and

FIG. 3 shows in top plan view the arrangement of a loop table projecting on one side and another loop table projecting on the other side.

The rolling mill illustrated by way of example in the drawings is intended for two wire or strand rolling. It is equipped with horizontal roll stands 1 and 2 and a vertical roll stand 3 situated between the stands 1 and 2.

Between the horizontal stand 1 and the vertical stand 3 a downwardly curved guide channel 4, 5 is provided for each wire to be rolled, whereas between the vertical stand 3 and the horizontal stand 2 a guide channel 6, 7 and a loop table 8, 9 are provided for each wire to be rolled.

' horizontal stand 2.

The loop tables 8 and 9 are relatively displaced in height. In front of the inlet to each guide channel 6, 7 a swinging lever 11 is arranged which is actuated by a compressed air or hydraulic cylinder 10 or in some other manner and serves for pressing the rolled wire out of its guide channel. The loop tables are provided with an abutment wall 12 which prevents the jaculating stock from getting hooked-up and constitutes a guide for the stock to the grooves or passes of the horizontal stand. In addition, the lateral boundary wall of the guide channels is provided on the end at which the wire is pressed out by the lever 11 with a ramp or slope 16 at the inlet end of the guide channel to assist the stock passing out over the edge of the guide channel. The ends of the loop tables on the horizontal stand 2 are at the same height.

The apparatus operates in the following manner:

The wires 13 and 14 passing out from the horizontal stand 1 are guided by the channels 4 and 5 into the vertical stand 3 and on leaving the passes or grooves of this stand are guided by the channels 6 and 7 into the When the wires or strands have been gripped in the horizontal stand 2 each wire is automatically pressed out of its guide channel by the swinging lever 11, coordinated to this channel so that loop formation can take place.

The rolling direction is indicated by the arrow 15.

The loop tables are located one above the other on the same side of the machine in the embodiment illustrated in FIGS. land 2.

In FIG. 3 the loop table 8 is located on one side and the loop table 9 on the other side of the center line extending through both the stands 2 and 3. Accordingly, the swinging lever 11 and its cylinder 10 for one guide channel are arranged on one side and the swinging lever 11 and its cylinder 10 for the other guide channel are on the other side of the center line 17.

We claim:

1. In a rolling mill for the continuous, uniform rolling of several strands, a first horizontal stand, a second horizontal stand, a vertical stand, said vertical stand being positioned between said horizontal stands, a rigid guide channel for each strand positioned between said first horizontal stand and said vertical stand, said guide channels being downwardly curved and open on top, said guide channels guiding each of said strands from the passes of said first horizontal stand to be corresponding passes of said vertical stand, a plurality of loop tables positioned between said vertical stand and said second horizontal stand, each of said loop tables having a horizontal guide groove open on top for guiding a single strand from a pass of said vertical stand to a corresponding pass of said second horizontal stand, each of said loop tables further provided with a lever for pushing the strand out of the guide groove laterally onto the loop table after it has been caught by said second horizontal stand.

4 2. In a rolling mill for the continuous simultaneous rolling of a plurality of wires, a plurality of horizontal stands of rolls, a plurality of vertical stands of rolls, each vertical stand respectively positioned between successive pairs of said horizontal stands; a plurality of downwardly curved open topped rigid guide channels respectively for each of said wires positioned between adjacent horizontal and vertical stands in the direction of flow of said wires, a plurality of loop tables respetcively for each of said wires positioned between adjacent vertical and horizontal stands in the direction of flow of said wires, a plurality of horizontal guide channels respectively for each of said wires and respectively positioned on said loop tables, and ejecting means respectively for each of said wires for pushing said wires out of their respective horizontal guide channel laterally onto their respective loop table after said wires have been gripped by the horizontal stand adjacent said loop tables.

3. In a rolling mill in accordance with claim 2 where- V in said ejecting means comprises a swinging lever controlled by a fluid operated device and each of said loop tables comprising an abutment wall for guiding said wires to the roll of said horizontal stand adjacent said loop tables.

4. In a rolling mill in accordance with claim 3 wherein said loop tables have a main portion vertically displaced relative to each other and have their ends converging toward a common horizontal plane for guiding said wires to the roll of said horizontal stand adjacent said loop tables.

5. In a rolling mill in accordance with claim 4 wherein some of said loop tables are on one side of a central line passing through said vertical and horizontal stands and the remaining loop tables are on the other side of said central line.

6. In a rolling mill in accordance with claim 4 wherein said loop tables are on one side only of a central line passing through said vertical and horizontal stands.

References Cited in the file of this patent UNITED STATES PATENTS 

1. IN A ROLLING MILL FOR THE CONTINUOUS, UNIFORM ROLLING OF SEVERAL STRANDS, A FIRST HORIZONTAL STAND, A SECOND HORIZONTAL STAND, A VERTICAL STAND, SAID VERTICAL STAND BEING POSITIONED BETWEEN SAID HORIZONTAL STANDS, A RIGID GUIDE CHANNEL FOR EACH STRAND POSITIONED BETWEEN SAID FIRST HORIZONTAL STAND AND SAID VERTICAL STAND, SAID GUIDE CHANNELS BEING DOWNWARDLY CURVED AND OPEN ON TOP, SAID GUIDE CHANNELS GUIDING EACH OF SAID STRANDS FROM THE PASSES OF SAID FIRST HORIZONTAL STAND TO BE CORRESPONDING PASSES OF SAID VERTICAL STAND, A PLURALITY OF LOOP TABLES POSITIONED BETWEEN SAID VERTICAL STAND AND SAID SECOND HORIZONTAL STAND, EACH OF SAID LOOP TABLES HAVING A HORIZONTAL GUIDE GROOVE OPEN ON TOP FOR GUIDING A SINGLE STRAND FROM A PASS OF SAID VERTICAL STAND TO A CORRESPONDING PASS OF SAID SECOND HORIZONTAL STAND, EACH OF SAID LOOP TABLES FURTHER PROVIDED WITH A LEVER FOR PUSHING THE STRAND OUT OF THE GUIDE GROOVE LATERALLY ONTO THE LOOP TABLE AFTER IT HAS BEEN CAUGHT BY SAID SECOND HORIZONTAL STAND. 